Grindstone



UNITED STATES PATENT OFFICE.

JOHN B. KIBLER, OF MINNEAPOLIS, MINNESOTA.

GRINDSTONE.

SPECIFICATION forming partV of Letters Patent No. 446,920, dated February 24, 1891.

l) Application ld .Tune 7,1890. Serial No. 354,552. (No model.)

To all whom it mag/concern..-

Be it known that I, JOI-IN B. KIBLER, a citizen of the United States, residing at Minneapolis,in the county of Hennepin and State of Minnesota, have inventedcertain new and useful Improvements in Grindstones, of which the following is a specification.

My invention relates to grindstones for household purposes', for sharpening cutlery, &c.

The object is to produce a convenient and inexpensive organization of devices that can be effectivelyA used by persons of litt-le skill. This object is accomplished by the devices shown in the accompanying drawings, in which- Figure l is a side elevation, Fig. 2 a front elevation, and Figs. 3 and 4 details, of parts of an apparatus embodying my improvements.

In said drawings, l designates a wooden wheel having beveled sides 2, coated with emery or other suitable material, and 3 is the 'horizontal 'shaft which carries the wheel.

The shaft is mounted in a frame composed of two pieces 4 and 5. The former may be a flat plate of any suitable shape adapted to be attached by screws 6 or other means to a wall or other object 7. The lower ,portion of this plate is curved, as indicated at S, and terminates in a vertical flange 9. The frame-piece 5 has its lower portion curved, as at 10, and terminates in a flange 1l, corresponding to the flange 9 ofthe otherpiece. At its upper end it has a slot l2, which provides a bearing for the shaft 3. Preferably this socket is of. smaller diameter than the shaft, and the 'portion of the shaft which enters it is reduced in size, as shown at 13, to avoid the horizontal play of the shaft in its bearings. An end bearing 14. is provided in the piece e, into which the shaft can be inserted as it is being let down into the slot l2. The outer end of the shaft carries a pinion l5, which engages internal gears in a wheel 16. The latter wheel has a handle 17 for turning it, and revolves on a spindle 18 provided on the frame 5. VThe wheel is secured on its spindle by a bolt 19 having a nut 20, by means of which it can be easily removed and replaced. The spindle 18 is formed on a projecting portion of the frame 5, so that the gear-wheel will overhand the pinion and its internal teeth engage the lat- -9 and 11 of the shaft-supporting frame.

ter. The size of these two wheels should be so proportioned as to give the desired speed to the grinding-wheel. A tool-rest 21, having a horizontal support 22, is secured by clamping its lower end between the flanges Its lower end has a flat piece 23 fitting over the edges of the flanges 9 and 11, and the parts are secured together by a bolt 24. Thus all of the parts are adapted to be easily put together and taken apart.

In use the wheel may be revolved with one hand while with the other a knife, as shown at 25, can be easily held in position for sharpening by resting its back on the tool-rest and shaft, as indicated in Fig. 2. Cutlery may thus be quickly and easily sharpened for ordinary household purposes.

Vhat I claim is- 1. In combination with a grinding-wheel, a shaft carrying a pinion, a gear-wheel for turning it, a frame composed of two detachable parts, one providing an end bearing for the shaft and adapted to be secured to a wall and the other providing bearings for the shaft and the gear-wheel, substantially as set forth.

2. In combination with a grinding-wheel, a shaft therefor carrying a pinion, an internally-geared wheel for turning it, a tool-rest, and a frame for supporting said parts, composed of two portions, one of which is adapted to be secured in a wall and provides an end bearing for the shaft, and the other of which vprovides a spindle for the gear-wheel and a JOHN B. KIBLER. `Witnessesz E. M. SCHUMANN, P. l-I. GUNOKEL. 

